October 30, 2015

Rain – Pathogens

The down side of using certain types ofbacteria to seed rain clouds, is that they may be pathogenic to plants.

October 29, 2015

Rain – Bacteria

A certain type of bacteria is a catalyst for producing rain in clouds.

October 28, 2015

Rain – Impurities

What enables water in clouds to freeze at higher temperatures than pure water?

October 27, 2015

Rain – To Freeze or Not to Freeze

In order for it rain, water must first freeze inside a cloud.

October 26, 2015

Redwoods – Cleanup

Outfitting a redwood with 300 pounds of research equipment is a great way to make discoveries. Taking it all down again is another story.

October 23, 2015

Redwoods – Battery

When research equipment is wired into a giant redwood, an 80-pound battery must be hoisted 300 feet into the canopy.

October 22, 2015

Redwoods – Sap Flow

How and when do giant redwoods drink their water? Tiny sap flow sensors tell the story.

October 21, 2015

Redwoods – Clearcut

Observe an ancient redwood, and you can read the signs of adversity in its wood.

October 20, 2015

Redwoods – Too Tall

Is there a limit to how tall trees can grow?

October 19, 2015

Redwoods – Tallest Tree

Amidst a clearcut forest and host to a pesky woodpecker, the world’s tallest tree is a remarkable specimen.

October 16, 2015

Volcano – Eruption

Geophysicist Milton Garces studies an active volcano’s low frequency sound patterns in an effort to predict large-scale eruptions.

October 15, 2015

Voluntourism – Model Program

Volunteer tourism encourages an exchange of ideas and experience between people of different cultural backgrounds.

October 14, 2015

Voluntourism – Beekeeping

In Mexico, a successful project is bringing together tourist-volunteers and local beekeepers.

October 13, 2015

Volunteer Tourism

Volunteer tourism is becoming an important economic and cultural resource in many countries around the world.

October 12, 2015

Alarm Calls – Around the World

Is there a universal language of alarm calls?

October 9, 2015

Alarm Calls – Early Warning System

Birds “mobbing calls” make it easy for all the animals in a locale to know exactly when a predator is nearby.

October 8, 2015

Alarm Calls

What’s a bird to do when it sees a predator lurking nearby?

October 7, 2015

Oysters – Chesapeake Bay

Chesapeake Bay – home to a multimillion dollar oyster industry, is threatened by industrial and agricultural pollution.

October 6, 2015

Oysters – Acidification

Increasing levels of acidity in our oceans could have a serious impact on the oyster industry.

October 5, 2015

Oysters – Important Species

They’re an important shellfish, both for their environmental and economic value.

October 2, 2015

Volcano – Climb

Volcanoes may emit low frequency sounds prior to erupting. Scientists are using microphones to monitor these infrasounds.

October 1, 2015

Plovers – Inlets

In wildlife preserves, when should we allow nature to “take its course” and when should we intervene?